This double feature of films based on Philip K. Dick stories will be followed by a panel of local authors discussing Philip K. Dick in the Bay Area.

Impostor at 2 p.m.
Spencer Olham, a designer of top-secret government weapons, is arrested on his way to work by Major Hathaway of the Earth Security Administration. Olham is accused of being an android bomb created by enemy aliens. Directed by Gary Fleder, starring Gary Sinise, Madeleine Stowe, Vincent D'Onofrio, and Mekhi Phifer. PG-13, 95 mins., 2001.

A Scanner Darkly at 3:45 p.m.
In the near future a narcotics cop in Orange County becomes addicted when he goes undercover. Directed by Richard Linklater, starring  Keanu Reeves, Robert Downey Jr., Woody Harrelson, and Winona Ryder. R, 100 mins., 2006.